Door lock set



@M1/ib www Jan. 5, 1932. J. c. WRATSCHKO DOOR LOCK SET Filed Dec. 27. 1929 v .Ara A- Il [112: r

um n @w Patented Jan. 5, 1932 JOSEPH c. witn'rscnxo, orinnw, BRITAIN, coNNncrIoU'r noon Loox "snr Application filed December 27,1929. k'Serial No. 416,804.

rllhis invention relates to door lock sets, and

more particularly to a lock set in which the door may be unlatched by turning the knob in one direction, and locked against further unlatching by turning the knob in the other direction.

One object of the invention is to provide a device of the above nature, in which the parts will be restored to their original unlocked position by the use of a key-operated cylinder or other device.

A. further object is to provide a device of the above nature which will be relatively simple in construction, inexpensive to manufacture, easy to install and manipulate, compact, and very eiiicient and durable in use.

Vith these and other objects in view there has been illustrated on the accompanying drawings one form in which the invention 20 may be conveniently embodied in practice.

Fig. 1 represents an elevation of the lock set as viewed from the inside of th-e door with the ycover of the casing removed and showing the door frame in section, the door being latched but unlocked.

F ig. 2 is a view similar to Fig. 1 but showing the door in locked position with the lug on the key-operated cylinder ready to engage the sliding frame to unlock the door. Fig. 3 is an end elevation of the door, with the front part oi the casing broken away to e show the interior construction. Y

Fig. 4 is a horizontal sectional view taken alonO' the line 4-4 of Fig. 1 looking downwardly. Y

Referring now to the drawings in which like reference numerals denote corresponding parts throughout the severalV views', the numeral 10 indicates a doorV having a' rectangular cavity 11 for receiving a lock casing `12, said casing being located'in alinement with a catch recess 13 formed in the door frame 14. The door frame 14 has a iiat'metal plate 15 located in the front of said recess 13, said plate 15 having an aperture 1G, the length of which is somewhat shorter than that of the recess 13, for a purpose to be here- Y 'matter described. Located withinthe casing 12 is a horizontal latch bolt 17 having a slot 18 tted around a pin '19 adapted to guide the rear' part of the bolt in its sliding motion. In order to permit the latch bolt 17 to be retracted into the casing, said bolt 17 is provided-.with a rear flange 20 adapted to be engagedby the extremity 21 of an upwardly ex- V55 tending arm 22 carried on a hub 23, said hub having a squared aperture 24 fitting a square handle-operated rod 25. The hub 23 is also provided with a downwardly-inclined arm 26 located at about 150 degrees., from. said arm 22, andboth oisaid arms 22 and 26 are adapted to be resiliently engaged by a spring 27, one extremity Aor" which is fixed within a block 28secured tothe casing 12.l v

4By means othis construction, the arm 22 will tend to remain .in the neutral position shown in Fig.`1 atalltimes, and will be re'- turned to said position automatically by said spring 27 whenever the handle-.operated rod 25 is released; after being turned in -either direction.V ,Y v

The outer lend ot thelatch bolt 17 isprovided with an enlarged downwardly extendinglatchmember'29, havin@ its outer` face 30 'beveledat' an angleof about 45` degress, 75

wherebyk ,when` the door is being closed, Y.the latch bolt 17 will bemoved rearwardly. into Vthe casing 12 by the striking of the beveled face 30 of the latch'memberagainst the vertical edge of the plate aperture 16. -80

Pivotally mounted on a pin 31 projecting from the intermediate portion of the latch bolt 17 is an upper lockingmember 32 having anupwardly extending toot 33 adapted to lie 4flush with the lend of the latch memberk 29 85 when the parts are in the unlocked position,

as shownin Fig. 1. A lower locking lever 34 is alsojprovided, being pivoted to la depending portion of the latch member 29 on a Ypin 35, and said Vlower locking member 34 is con- 90 nected to the upper `locking member 32 by a 1ink'member`36, as most clearly shown in l Fig. 1'. The lowerlocking lever has a depending foot 37 similar to the foot 33. Y

yBy means of' this construction, it Awillbe seen that whenk the upper locking member '32 is swung upwardly into itslocking position, the lower locking member 34 rwill also be swung downwardly. This will cause the feet 33 and137 to spread apart and lie behind the u edge of the plate aperture` 16, thus locking its other end located in a slot 40a adjacent a semi-circular section 41 of said upper lock,- ing lever 32. The lower spring 39 issecured` at one end to a block42 on a sliding frame. 43 and the other end of said spring 39 presses to the right againsta shoulder 44l on the dev pending latch member 29.

In order to prevent the locking levers from returning tothe unlocked position shown in Fig. 1, said, sliding frame is provided at its .upper edge with a vertical slot 45 adapted to lit about an arm 46 depending Jfrom the lower edge of the upper locking lever 32. The sliding frame 43V is pressed upwardly at all timesby a spring 47 having .one end fixed in a block 48 located on said casing 12.

Operation Y In operation, whengthe Adoor is. closed, the latch bolt 17 will first b-e retracted into the casing by the engagement oitl thevbeveled face 30 with the kedge ot the aperture 16, and will then snap back into the catch recess 13. Vhen it is desiredy to again open the door, it may be unlatched merely byl turning the handle-operated rod 25 in a counter-clockwise direction, asviewed in Fig. 1, thus retracting the latch bolt l17 intothe casing 12. Y

lVhen'it is desired to lock the door, it will only be necessary to turnthe handle-operated rod clockwise, as viewed inFig. 1, whereupon the arm 22 of the hub 23v will engage the-rear edge .49 ot' the upper locking lever 32, causing said lever 32 as wellas the lower lever 34 to swing from the positions shown in Fig. 1 tothe spreadhapart positions shown in Fig.

V2.l The rotation of the locking lever 32 as just described.v will bring the depending arm 46 thereof into alinement with the slot'45-in the sliding frame 43, permitting said frame 43to be moved upwardly automatically Vby the spring 47, thus preventing the locking leversfrom moving back to their unlocked position shown in Fig. 1.

Vhen it is desired to unlock the door, it will only be necessary tor the operator to insert the key, not shown, into a cylinder 50 having a side lug 51, and to rotate said cylinder in aclockwise direction until said lug 51 engages van inclined projection 52 on the bottom of the'sliding frame 43. The frame 43 will thus be caused to move downwardly until the slot 45 is disengaged from the arm 46A This will permit` the springs 38v and' 39 to move the locking levers 32 and 34, from the locked position shown in Fig. 2 to the une' wardly by the arm 46.

While there has been disclosed in this specication one form in which th-e invention may be embodied, it is to be understood that this form isushown for the purpose of illustration only, and that the invention is not to be lim` ited to the specilic disclosure but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the moditications and embodiments coming within the scope ot' the following claims.

Having thus fully described theA invention, what is claimed as new, and for which it is desired to secureLetters Patent, is:

1. In a door lock set, a door casing adaptf ed to lie in alinement with a door frame catch recess, a manually operated rod passingY through said casing, a latch bolt in said casing and normally-seated in saidV recess when the Vdoor is closed, means connected to said rod for retracting said latch bolt when said rod is turned in one direction, a lever pivoted to said latch bolt for swinginginto locking engagement` with said recess when the rod is turned in the opposite direction, a link pivotally connected to said lever, and a second lever pivoted to said link for also swinging into locking engagement with said recess simultaneously with said first lever.

2. Ina door' lock set, a door casing adapted to aline with a door frame catch recess, a sliding latch bolt in said casing for engaging with said recess, manually-operated means for retracting said bolt when moved in one direction for permitting the door to be opened, -meanson said bolt to be engaged by said manually-operated means to lock said bolt within said recess when moved in another direction, and a frame slidable at right angles to said latch bolt for retaining said bolt in locked position until released by a key.

3. In a door lock set, a door casing adapted to lie in alinement with a door frame catch recess, a manually-operated rod passing through said casing, a latch bolt in said casing and normally seated in said recess when the door is closed, means connected to said rod for retracting said latch bolt when said rodis turned in one direction, a lever pivoted to said latch bolt Jfor ,swinging into locking engagement with said recess when the rod is turned in the opposite direction, aV frame within said casing slidable transversely to said latch bolt for preventing said lever from` moving into locking engagement with said recess when said rod is turned in the first direction.

Y V4. Ina door lock-set, a. door casing adapted to lie in alinement With `a door frame catch recess, a manually-operated rod passing through said casing, a latch bolt in said casing and normally seated*V in said recess Y? when the door is closed, means connected to said rod for retracting said latch bolt when said rod is turned in one direction, a lever pivoted to said latch bolt Jfor swinging into locking engagement with said recess when the rod is turned in the opposite di rection, a :Era-nie Within said casing slidable transversely to said latch bolt for preventing said lever from moving into locking engagement with said recess When said rod is T5 turned in the iirst direction,'said lever having a depending lug, and said frame having a slot to receive said lug for preventing said lever from being moved out of locking engagement With said recess. 2@ In testimony whereof, l have aixed my signature to this specification.

JOSEPH C. WRATSCHKO. 

